This test is basically a duplicate of the [dependency test](https://github.com/klaaspieter/ember.js/blob/07e9fa741d401e58bb265c6d005ba78f68b0c1ec/packages/ember-routing/tests/system/controller_test.js#L3-L20). They can be rolled into one but I thought it better for the sake of the pull request to have a test that explicitly tests the behavior that was added.